Zoom lens and zoom lens module

摘要

A zoom lens and a zoom lens module are provided. The zoom lens is configured to form an image of an object at an object side onto an image plane at an image side. The zoom lens includes a first lens group, a second lens group, a third lens group and a fourth lens group disposed in sequence from the object side towards the image side. The refractive powers of the first lens group, the second lens group, and the third lens group are negative, positive, and negative, respectively. The zoom lens satisfies 1.90<|T1G/FW|<2.40. T1G is a distance of the first lens group along an optical axis of the zoom lens, and FW is an effective focal length of the zoom lens when the zoom lens is at a wide-end.

主权项

1. A zoom lens configured to form an image of an object at an object side onto an image plane at an image side, the zoom lens comprising:
a first lens group disposed between the object side and the image side and having a negative refractive power; a second lens group disposed between the first lens group and the image side and having a positive refractive power; a third lens group disposed between the second lens group and the image side and having a negative refractive power; and a fourth lens group disposed between the third lens group and the image side, wherein the first lens group and the fourth lens group are each a fixed group, the second lens group is capable of moving with respect to the first lens group to achieve zooming, the third lens group is capable of moving with respect to the first lens group to achieve focusing, and the zoom lens satisfies 1.90